Waveform Contenders for 5G - Suitability for Short Packet and Low Latency Transmissions
Waveform Contenders for 5G - Suitability for Short Packet and Low Latency Transmissions
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DOI：
10.1109/vtcspring.2014.7023145
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发表时间：
2014-05
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影响因子：
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通讯作者：
F. Schaich;T. Wild;Yejian Chen
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文献类型：
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作者：
F. Schaich;T. Wild;Yejian Chen
在本文中，我们比较了 5G 空中接口的三种候选多载波波形：滤波 CP-OFDM（4G 的选择）、FBMC（近年来广泛讨论）以及通用滤波多载波（UFMC）（最近出现的新竞争者）。我们在传输非常小的突发（例如机器对机器通信）和非常严格的响应时间要求（例如车辆对车辆通信）时判断它们的时频效率。虽然 FBMC 在传输长序列时非常高效，但在必须传输短突发/帧时会受到影响。由于循环前缀和宽频率保护，OFDM 的效率相当低。 UFMC 被证明是最佳选择，在任何情况下，其性能均优于 OFDM 约 10%，在数据包非常短的情况下，其性能优于 FBMC，而对于长序列，其性能与 FBMC 类似。
In this paper we compare three candidate multicarrier waveforms for the air interface of 5G: filtered CP-OFDM - the choice for 4G, FBMC - heavily discussed in recent years, and Universal Filtered Multi-Carrier (UFMC) - a new contender making its appearance recently. We judge their time-frequency efficiency when transmitting very small bursts (e.g. for machine to machine communications) and under very tight response time requirements (e.g. for vehicle to vehicle communications). While FBMC is very efficient when transmitting long sequences, it suffers when having to transmit short bursts/frames. Due to the cyclic prefix and wide frequency guards, OFDM is rather inefficient. UFMC proofs to be the best choice, here, outperforming OFDM by about 10% in any case and FBMC in case of very short packets while performing similar for long sequences.